Efficient phaser actuation supply system
US9200547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2013 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Oct 8, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M2001/123
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic cam phaser includes at least one of an advance chamber and a retard chamber for receiving hydraulic fluid for advancing or retarding a rotational position of the camshaft. The hydraulic actuation system includes a hydraulic accumulator in selective communication with the at least one of the advance and retard chambers of the hydraulic cam phaser. A first system oil pump provides lubrication oil to the valvetrain system, and the hydraulic actuation system includes a second oil pump for supplying oil to the hydraulic accumulator. The second oil pump is controlled with a clutch device connecting the second oil pump to the engine drive system. The internal combustion engine includes a controller which controls actuation of the clutch device to actuate the clutch device during deceleration of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.